<div class="panel panel-default">
    <div class="panel-heading"><i class="glyphicon glyphicon-th-large"></i> Menu</div>
    <ul class="list-group">
        <li class="list-group-item"><a href="admin.php"><i class="glyphicon glyphicon-home"></i> Trang chủ</a></li>
        <li class="list-group-item"><a href="admin.php?r=articles/index"><i class="glyphicon glyphicon-list"></i> Bài viết</a></li>
        <li class="list-group-item"><a href="admin.php?r=categories/index"><i class="glyphicon glyphicon-th-list"></i> Danh mục</a></li>
        <li class="list-group-item"><a><i class="glyphicon glyphicon-star-empty"></i> Quảng cáo</a></li>
        <li class="list-group-item"><a><i class="glyphicon glyphicon-cog"></i> Cài đặt</a></li>
    </ul>
</div>